Hi I want to ask what am i missing?

My server has to be firewalled. I forwarded the ip and query port and when you do the check/update button it works fine. But every now and then i come back to gametracker and says server offline but it not!
I do the update button, and its fine.

I think i forwarded 1 of those ip's it provided. Would that be enough or so you have to forward them all?

All.